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/*
* Copyright (C) 2011 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "arena_bit_vector.h"
#include "allocator.h"
#include "arena_allocator.h"
namespace art {
template <bool kCount>
class ArenaBitVectorAllocatorKindImpl;
template <>
class ArenaBitVectorAllocatorKindImpl<false> {
public:
// Not tracking allocations, ignore the supplied kind and arbitrarily provide kArenaAllocSTL.
explicit ArenaBitVectorAllocatorKindImpl(ArenaAllocKind kind ATTRIBUTE_UNUSED) {}
ArenaBitVectorAllocatorKindImpl(const ArenaBitVectorAllocatorKindImpl&) = default;
ArenaBitVectorAllocatorKindImpl& operator=(const ArenaBitVectorAllocatorKindImpl&) = default;
ArenaAllocKind Kind() { return kArenaAllocGrowableBitMap; }
};
template <bool kCount>
class ArenaBitVectorAllocatorKindImpl {
public:
explicit ArenaBitVectorAllocatorKindImpl(ArenaAllocKind kind) : kind_(kind) { }
ArenaBitVectorAllocatorKindImpl(const ArenaBitVectorAllocatorKindImpl&) = default;
ArenaBitVectorAllocatorKindImpl& operator=(const ArenaBitVectorAllocatorKindImpl&) = default;
ArenaAllocKind Kind() { return kind_; }
private:
ArenaAllocKind kind_;
};
using ArenaBitVectorAllocatorKind =
ArenaBitVectorAllocatorKindImpl<kArenaAllocatorCountAllocations>;
template <typename ArenaAlloc>
class ArenaBitVectorAllocator final : public Allocator, private ArenaBitVectorAllocatorKind {
public:
static ArenaBitVectorAllocator* Create(ArenaAlloc* allocator, ArenaAllocKind kind) {
void* storage = allocator->template Alloc<ArenaBitVectorAllocator>(kind);
return new (storage) ArenaBitVectorAllocator(allocator, kind);
}
~ArenaBitVectorAllocator() {
LOG(FATAL) << "UNREACHABLE";
UNREACHABLE();
}
void* Alloc(size_t size) override {
return allocator_->Alloc(size, this->Kind());
}
void Free(void*) override {} // Nop.
private:
ArenaBitVectorAllocator(ArenaAlloc* allocator, ArenaAllocKind kind)
: ArenaBitVectorAllocatorKind(kind), allocator_(allocator) { }
ArenaAlloc* const allocator_;
DISALLOW_COPY_AND_ASSIGN(ArenaBitVectorAllocator);
};
ArenaBitVector::ArenaBitVector(ArenaAllocator* allocator,
unsigned int start_bits,
bool expandable,
ArenaAllocKind kind)
: BitVector(start_bits,
expandable,
ArenaBitVectorAllocator<ArenaAllocator>::Create(allocator, kind)) {
}
ArenaBitVector::ArenaBitVector(ScopedArenaAllocator* allocator,
unsigned int start_bits,
bool expandable,
ArenaAllocKind kind)
: BitVector(start_bits,
expandable,
ArenaBitVectorAllocator<ScopedArenaAllocator>::Create(allocator, kind)) {
}
} // namespace art